sammydice

Hi...

Just wondering...

Can Twin Scroll Turbo's used on the JDM STI be fitted to a UK STI ?

Cheers

Ian

TonyBurns

iTrader: (3)

If you replace half the engine, yes

Tony

MrRA

In order to fit a twin scroll unit you would need to change the headers, up-pipe, down-pipe and the sump.

stevebt

iTrader: (8)

There are much better turbos around than the twin scroll ones.

TonyBurns

iTrader: (3)

At the moment and only for BIG bhp (like 500+)

Tony

merlin24

iTrader: (1)

And the Crank windage tray/oil pickup pipe/dipstick and tube.

MrRA

All things being equal, a twin scroll unit will outperform a single scroll couterpart pretty much everywhere except for the highend rpm range, where the twin scroll exhaust housing becomes a slight restriction in itself.

The Litchfield camp are doing some impressive work in developing hybrid twin scroll units that will provide high end power with quick spool up.

T5NYW

iTrader: (4)

I was well impressed with the MY08 Type20 Turbo, awesome

Tony

stevebt

iTrader: (8)

I had a hybrid twin scroll turbo on my car running 1.8bar and I wasn't impressed thats why I now have a single scroll turbo. But all things aren't equal as he is asking about a twin scroll turbo on a UK car and £ for lb its a proper no brainer

morpheus1870

You will find the twin scroll spools up that little but quicker but on a power graph it would eventually come in line with the uk turbo higher up in the rev band. The H321 is good turbo alternative, not cheap though but neither is the twin scroll.

TonyBurns

iTrader: (3)

Twin scroll is still in its infancy when it comes to turbo's, it is the way ahead, this is why you are seeing more and more manufacturers going for it, less lag and better power delivery from low down and much smoother than a single scroll.
Its not worth going from a single scroll to a twin scroll, but the developement of the twin scroll hybrids will eventually outweigh that of the single scroll turbo's and they will become the norm

Tony

rickya

iTrader: (18)

Interesting. I hope Litchfield & others do develop bigger & better twin scroll turbos in the future